Mixture equivalence principles and post-quantum theories of gravity
We examine the mixture equivalence principle (MEP), which states that proper and improper mixed states with the same density matrix are always experimentally indistinguishable, and a weaker version, which states that this is sometimes true, in…
In a very general setting, entropy quantifies the amount of information about a system that an observer has access to. However, in contrast to quantum mechanics, in quantum field theory naive measures of entropy are divergent.
At the dawn of general relativity's golden age in the 1950s, Irish mathematician and physicist John Synge proposed to reduce spatial concepts to temporal concepts.
The theory of relativity is generally assumed to provide us with a speed limit for all interactions. Particles cannot travel faster than the speed of light, nor can information. A standard argument for the impossibility of superluminal particles,…
A theoretical issue at the heart of the Measurement Problem in non-relativistic quantum mechanics (NRQM) is that the measurement theory (i.e., the Born rule and state update rules) cannot be derived from the application of the dynamical theory to a…
Quantum Foundations, Dynamical Born Rule and Intrinsic Triple Interference in Quantum Gravity
I will discuss the rigid information geometry of quantum theory, tied to the apparently rigid form of the Born rule, and its necessary generalization in quantum gravity, together with experimental implications that involve intrinsic triple and higher…
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